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Nissan Leaf motor coupler

54257 Views 154 Replies 34 Participants Last post by  remy_martian
I want to go with pauls controller and leaf motor,


Has anyone found a Coupler that will fit the leaf output shaft?

I dont really want to spend £600 for the gearbox just to use the shaft out of it.

anyone ??

Thanks
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There is also this post. Not a CAD file but it does have the numbers to plug into your own CAD file.


https://www.diyelectriccar.com/forums/showpost.php?p=914850&postcount=14


Bill
There is also this post. Not a CAD file but it does have the numbers to plug into your own CAD file.


https://www.diyelectriccar.com/forums/showpost.php?p=914850&postcount=14


Bill
Nice! Adapter plates are pretty easy in the end, especially if they are just flat plate.
First post here. Just want to share a short video I just made between Nissan Leaf motor and Suzuki Samurai/Sidekick clutch friction disc. There is a bit too much play in my opinion. You can check it out for yourself: https://youtu.be/rNISAE1mXzM
First post here. Just want to share a short video I just made between Nissan Leaf motor and Suzuki Samurai/Sidekick clutch friction disc. There is a bit too much play in my opinion. You can check it out for yourself: https://youtu.be/rNISAE1mXzM

That's good to see. It's similar to the slop on my clutch disc on my VW (although not quite as pronounced.). I've decided to make my own adapter with a shaper so hopefully it will come out very tight.
First post here. Just want to share a short video I just made between Nissan Leaf motor and Suzuki Samurai/Sidekick clutch friction disc. There is a bit too much play in my opinion. You can check it out for yourself: https://youtu.be/rNISAE1mXzM
It does look pretty loose. For comparison, someone should check the fit on a Samurai /Sidekick transmission input shaft.
Just want to share a short video I just made between Nissan Leaf motor and Suzuki Samurai/Sidekick clutch friction disc. There is a bit too much play in my opinion. You can check it out for yourself: https://youtu.be/rNISAE1mXzM
A clutch disk needs to float on the transmission input shaft. Rotational play is undesirable, but it needs to slide along the shaft easily.

If you are considering using the hub of the clutch disk as part of a coupler, to join the Leaf motor's shaft to a transmission input shaft, it might not be as snug a fit as you would like.
@CanadaLT28. Would be very interested to see how your own adapter with a shaper turns out. Please update us when available. Thanks
First post here. Just want to share a short video I just made between Nissan Leaf motor and Suzuki Samurai/Sidekick clutch friction disc. There is a bit too much play in my opinion. You can check it out for yourself: https://youtu.be/rNISAE1mXzM

I tried a FIAT twin cam 124/125/132/131 clutch plate on the leaf output shaft and it also has too much play. When the FIAT clutch plate is on the FIAT gearbox input shaft it is a snug fit with no decernable play.
There was a comment, I think by Brian, stating that there may be too much play and it would not be good, which is why I abandoned that route.

Tis the crazy time of year for house construction and renovation so I have not been able to get to work with my shaper yet. Hopefully I will have a spline cut within a few weeks.
I recently paid a gear and spline engineer to reverse engineer splines for the 2nd Gen Leaf motor. In other words; I currently have possession of precision spline data documentation for the Nissan Leaf motor power output shaft. We can do a group thing and / or you guys could place me in contact with a gear and spline engineering shop that comes highly recommended. Feel free to PM me as well.
Keith
[email protected]
+1 604 499 8357
I recently paid a gear and spline engineer to reverse engineer splines for the 2nd Gen Leaf motor. In other words; I currently have possession of precision spline data documentation for the Nissan Leaf motor power output shaft. We can do a group thing and / or you guys could place me in contact with a gear and spline engineering shop that comes highly recommended. Feel free to PM me as well.
Keith
[email protected]
+1 604 499 8357
I'll email you sometime today from my business account.
Also keen on a spline adaptor for leaf (2015)

would suggest something simple and generic that anyone can adapt to their own transmission or drive shaft like something in the picture below

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I tried a FIAT twin cam 124/125/132/131 clutch plate on the leaf output shaft and it also has too much play. When the FIAT clutch plate is on the FIAT gearbox input shaft it is a snug fit with no decernable play.
Let me say it like this....
I put a clutch plate spline into lovejoy coupler with a shrink fit. When coupler cooled down i was barely able to knock splines onto the shaft. Also i had to use the puller to remove it later. Shrink fit contracted splines somewhat so i now get a tight fit whereas there was some play before.
Let me say it like this....
I put a clutch plate spline into lovejoy coupler with a shrink fit. When coupler cooled down i was barely able to knock splines onto the shaft. Also i had to use the puller to remove it later. Shrink fit contracted splines somewhat so i now get a tight fit whereas there was some play before.

What size/type of Lovejoy coupling did you use? You can shrink a part like this by welding multiple, continues circles on the outside of the part. Your method would probably be better as it is easier to do with less cleanup machining needed. Also, less chance of annealing and warping the part.

Did you have to do some machining to get the shrink fit?
What size/type of Lovejoy coupling did you use? You can shrink a part like this by welding multiple, continues circles on the outside of the part. Your method would probably be better as it is easier to do with less cleanup machining needed. Also, less chance of annealing and warping the part.

Did you have to do some machining to get the shrink fit?
Yes I had to machine the coupler in a lathe. That was a long and tiresome procedure. Had to triple check dimensions.
Later I machined the spline part of the clutch on the outside. I heated up the coupler and quickly inserted the splines.
Later on I tried to weld the edges but I don't think it's necessary. I used countersunk bolts just to position the splines correctly.
I think i used 130mm coupling with 20mm unmachinned bore.



https://mazdamx3ev.wordpress.com/2018/05/17/sklopka-ven/
You can probably get away with using a Lovejoy coupling if your transmission input shaft is well supported by bearings inside the transmission like this: https://youtu.be/9cINT3KH5s0?t=430

Many front engine, rear wheel drive transmissions, where the input shaft is not well supported, would be quickly destroyed if a coupling like the Lovejoy type were used without some kind of pilot bearing or sleeve supporting and aligning the end of the shaft.

Some kind of pilot sleeve supporting the pilot bearing end of the input shaft might still be needed in your build for it to work properly. This is because the coupling may generate some side load on the shaft, and is quite a distance from the first support bearing. This is called an excess overhanging load.
You can probably get away with using a Lovejoy coupling if your transmission input shaft is well supported by bearings inside the transmission like this: https://youtu.be/9cINT3KH5s0?t=430

Many front engine, rear wheel drive transmissions, where the input shaft is not well supported, would be quickly destroyed if a coupling like the Lovejoy type were used without some kind of pilot bearing or sleeve supporting and aligning the end of the shaft.

Some kind of pilot sleeve supporting the pilot bearing end of the input shaft might still be needed in your build for it to work properly. This is because the coupling may generate some side load on the shaft, and is quite a distance from the first support bearing. This is called an excess overhanging load.

Yes i agree. You would have to create a casing for the transmission shaft support bearing. Usually this is added into transmission in center with the shaft end. Like lathe side load support rest.

It would have to be made to fit into coupler not onto shaft.
My transmission shaft is supported by end bearing and also has quite long end bushing (sleeve) to absorb side loading.
EDIT: I did use a generous amount of lithium grease while installin couplings.
One unknown specification of the splines is the tooth profile. If the spline teeth are like gear teeth, they will have a specified pressure angle that relates to the height/width ratio of the teeth and the curve on the tooth face. I know gears made with different pressure angles are not compatible: https://en.wikipedia.org/wiki/Pressure_angle
There are gauges for measuring the different gear diameter pitches and pressure angles: https://www.ebay.com/itm/Gear-Tooth...to-5-DP-14-5-Deg-Pressure-Angle-/253111082355

Here's info on splines: http://gearsolutions.com/departments/tooth-tips-a-brief-overview-of-splines/
Probably, the splined parts with different pressure angles will work. It's just that their torque transmitting capacity and service life may be reduced. Only time in use will tell if this is a problem. If it is, mainsource in post 90 probably has the best solution with a custom made splined coupling.
I recently paid a gear and spline engineer to reverse engineer splines for the 2nd Gen Leaf motor. In other words; I currently have possession of precision spline data documentation for the Nissan Leaf motor power output shaft. We can do a group thing and / or you guys could place me in contact with a gear and spline engineering shop that comes highly recommended. Feel free to PM me as well.
Keith
[email protected]
+1 604 499 8357

Did this pan out? how much for one or two?
I recently paid a gear and spline engineer to reverse engineer splines for the 2nd Gen Leaf motor. In other words; I currently have possession of precision spline data documentation for the Nissan Leaf motor power output shaft. We can do a group thing and / or you guys could place me in contact with a gear and spline engineering shop that comes highly recommended. Feel free to PM me as well.
Keith
[email protected]
+1 604 499 8357
when i was doing research on this almost 2 years ago, i found a shop that came highly recommended...

they did things the old school way (no cad stuff) IIRC.

if you are still looking to put a group buy together, maybe i can find that shop again?
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